482
FNCA52 TJSJ 280730
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
330 AM AST MON SEP 28 2026
DISCUSSION
NO FIRE DANGER IS EXPECTED TODAY.
PRZ014-282000-
SOUTHEAST COASTAL PLAINS-
330 AM AST MON SEP 28 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 10 20
TEMP (24H TREND) 90 (0) 74 (-2) 89
RH % (24H TREND) 49 (-8) 91 (+1) 55
WIND 20FT/EARLY(MPH) E 12 E 13 E 14
WIND 20FT/LATE(MPH) SE 14 NE 10 E 18
MIXING HGT(FT-AGL/MSL)5280 5760
TRANSPORT WND (MPH) E 15 E 16
VENT RATE (KT-FT) 68640 80640
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ015-282000-
SOUTHERN HILLS-
330 AM AST MON SEP 28 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 20 40
TEMP (24H TREND) 88 (+2) 71 (-2) 87
RH % (24H TREND) 58 (-8) 97 (+3) 63
WIND 20FT/EARLY(MPH) E 11 E 10 E 11
WIND 20FT/LATE(MPH) SE 11 NE 10 E 13
MIXING HGT(FT-AGL/MSL)5890 6130
TRANSPORT WND (MPH) E 14 E 14
VENT RATE (KT-FT) 70680 73560
DISPERSION 5 5
DSI 6 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ016-282000-
NORTH COASTAL PLAINS-
330 AM AST MON SEP 28 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS TSTMS SHOWERS
CHANCE PRECIP (%) 50 20 40
TEMP (24H TREND) 90 (0) 74 (-2) 88
RH % (24H TREND) 63 (-4) 98 (+1) 67
WIND 20FT/EARLY(MPH) E 11 E 16 E 13
WIND 20FT/LATE(MPH) E 17 E 10 E 17
MIXING HGT(FT-AGL/MSL)5000 5200
TRANSPORT WND (MPH) E 15 E 17
VENT RATE (KT-FT) 65000 78000
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ017-282000-
NORTHERN HILLS-
330 AM AST MON SEP 28 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 60 50 60
TEMP (24H TREND) 88 (0) 72 (-1) 87
RH % (24H TREND) 65 (-2) 98 (0) 69
WIND 20FT/EARLY(MPH) E 10 E 12 E 12
WIND 20FT/LATE(MPH) E 13 E 8 NE 16
MIXING HGT(FT-AGL/MSL)5680 5350
TRANSPORT WND (MPH) E 13 E 15
VENT RATE (KT-FT) 62480 69550
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ018-282000-
WEST COAST-
330 AM AST MON SEP 28 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 20 40 60
TEMP (24H TREND) 91 (+1) 73 (-2) 90
RH % (24H TREND) 62 (-4) 98 (+2) 66
WIND 20FT/EARLY(MPH) E 11 E 11 E 10
WIND 20FT/LATE(MPH) E 12 E 10 E 12
MIXING HGT(FT-AGL/MSL)4940 4930
TRANSPORT WND (MPH) E 10 E 9
VENT RATE (KT-FT) 44460 39440
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ019-282000-
EASTERN INTERIOR-
330 AM AST MON SEP 28 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 20 40
TEMP (24H TREND) 89 (+1) 72 (-3) 87
RH % (24H TREND) 61 (-4) 98 (+2) 66
WIND 20FT/EARLY(MPH) E 11 E 11 E 11
WIND 20FT/LATE(MPH) E 12 E 11 E 12
MIXING HGT(FT-AGL/MSL)6260 6600
TRANSPORT WND (MPH) E 14 E 14
VENT RATE (KT-FT) 75120 79200
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ022-282000-
LUQUILLO MOUNTAIN RANGE-
330 AM AST MON SEP 28 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY PCLDY MCLDY
PRECIP TYPE TSTMS TSTMS SHOWERS
CHANCE PRECIP (%) 50 50 50
TEMP (24H TREND) 85 (+2) 71 (-2) 83
RH % (24H TREND) 66 (-5) 100 (+3) 69
WIND 20FT/EARLY(MPH) E 10 E 9 E 10
WIND 20FT/LATE(MPH) E 10 E 9 E 11
MIXING HGT(FT-AGL/MSL)4750 4940
TRANSPORT WND (MPH) E 14 E 14
VENT RATE (KT-FT) 57000 59280
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ023-282000-
CENTRAL MOUNTAIN RANGE-
330 AM AST MON SEP 28 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 40 50 60
TEMP (24H TREND) 86 (+3) 69 (-2) 85
RH % (24H TREND) 64 (-6) 98 (+1) 70
WIND 20FT/EARLY(MPH) E 8 E 9 E 9
WIND 20FT/LATE(MPH) E 9 E 6 NE 10
MIXING HGT(FT-AGL/MSL)7060 6400
TRANSPORT WND (MPH) E 10 E 10
VENT RATE (KT-FT) 63540 57600
DISPERSION 5 5
DSI 6 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ024-282000-
CAYEY MOUNTAIN RANGE-
330 AM AST MON SEP 28 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 10 30
TEMP (24H TREND) 85 (+1) 71 (-2) 84
RH % (24H TREND) 65 (-3) 99 (+1) 67
WIND 20FT/EARLY(MPH) E 9 E 9 E 10
WIND 20FT/LATE(MPH) E 10 NE 9 E 12
MIXING HGT(FT-AGL/MSL)5500 5870
TRANSPORT WND (MPH) E 14 E 15
VENT RATE (KT-FT) 66000 76310
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ025-282000-
VIEQUES-
330 AM AST MON SEP 28 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 30 50
TEMP (24H TREND) 88 (-1) 77 (-1) 87
RH % (24H TREND) 65 (+2) 94 (+2) 67
WIND 20FT/EARLY(MPH) E 13 E 14 E 13
WIND 20FT/LATE(MPH) E 13 E 14 E 14
MIXING HGT(FT-AGL/MSL)3510 3340
TRANSPORT WND (MPH) E 16 E 17
VENT RATE (KT-FT) 49140 50100
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ026-282000-
CULEBRA-
330 AM AST MON SEP 28 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 40 50
TEMP (24H TREND) 89 (0) 79 (-1) 88
RH % (24H TREND) 64 (-4) 91 (0) 67
WIND 20FT/EARLY(MPH) E 13 E 14 E 13
WIND 20FT/LATE(MPH) E 12 E 14 E 14
MIXING HGT(FT-AGL/MSL)3430 3380
TRANSPORT WND (MPH) E 16 E 17
VENT RATE (KT-FT) 48020 50700
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ027-282000-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
330 AM AST MON SEP 28 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE NONE SHOWERS TSTMS
CHANCE PRECIP (%) 0 10 50
TEMP (24H TREND) 90 (0) 74 (-3) 89
RH % (24H TREND) 51 (-8) 90 (+1) 57
WIND 20FT/EARLY(MPH) E 16 E 13 E 13
WIND 20FT/LATE(MPH) SE 18 E 12 E 17
MIXING HGT(FT-AGL/MSL)5090 5430
TRANSPORT WND (MPH) E 17 E 10
VENT RATE (KT-FT) 76350 48870
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ001-282000-
SAINT THOMAS AND SAINT JOHN-
330 AM AST MON SEP 28 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 40 40
TEMP (24H TREND) 86 (-1) 77 (-2) 85
RH % (24H TREND) 70 (0) 93 (+3) 72
WIND 20FT/EARLY(MPH) E 13 E 14 E 14
WIND 20FT/LATE(MPH) E 12 E 14 E 14
MIXING HGT(FT-AGL/MSL)3370 3360
TRANSPORT WND (MPH) E 16 E 20
VENT RATE (KT-FT) 47180 57120
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ002-282000-
ST CROIX-
330 AM AST MON SEP 28 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 40 30
TEMP (24H TREND) 87 (-1) 77 (0) 86
RH % (24H TREND) 70 (+1) 96 (0) 72
WIND 20FT/EARLY(MPH) E 13 E 13 E 13
WIND 20FT/LATE(MPH) E 12 E 13 E 14
MIXING HGT(FT-AGL/MSL)4750 5020
TRANSPORT WND (MPH) E 16 E 18
VENT RATE (KT-FT) 66500 80320
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
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